Your Outlook and Outlook Express email. (Note that Outlook email is only indexed once Outlook has been closed and opened at least once after installation of Desktop Search.)

The web pages in your Internet Explorer web history.

Your AIM chats

The files and folders on your hard drive (the ones you actually look at, not the system files only your computer uses).

Its just finished indexing my emails in Outlook. I like the ease with which you can search your emails. Much easier to use than Lookout. You can home in on just email, file, chats or web history results and there is a view for email threads. As for files: .txt, .html, Microsoft Word, Excel, and PowerPoint files are indexed.